The interaction was considered a faux pas by the President of the United States as it is considered rude to turn your back to the Queen or walk in front of her, reported the BBC.

After footage of his mistake surfaced online, Brits defended the 92-year-old monarch.

"Did Donald Trump just WALK IN FRONT OF THE QUEEN?!?!?!" asked one Twitter user.

"I detested how Trump dared walk in front of the Queen today," wrote another.

For the 70 years Prince Philip and the Queen have been married, the Duke of Edinburgh has always walked a few steps behind her when they appear together in public.

Even Prime Ministers are familiar with this protocol – leaving the weekly audience with the monarch by backing out of the room without turning around.

Trump was also criticised for not bowing to the Queen upon his arrival.

Critics also said the president was late getting to the castle, forcing the Queen to wait in the Quadrangle of the castle.

However, others insisted that he was on time.

"For all those asking, no, Trump did not keep the Queen waiting. He was due at 5 pm and the motorcade drove into the Quadrangle at 4.59pm," Royal commentator Victoria Arbiter noted.

“Not a royalist but didn't like the way Trump was late for the Queen didn't bow & walked in front of her. Shows how disrespectful to women he is if he is like that to the most famous woman in the world!," tweeted a user.

Despite the many protests in England about Trump’s visit, the President said he was looking forward to meeting the monarch.

"I really look forward to meeting [the Queen]. I think she represents her country so well," Trump said in an interview with The Sun.

“If you think of it, for so many years she has represented her country, she has really never made a mistake. You don’t see, like, anything embarrassing. She is just an incredible woman."